/* 获取宽高 */

html{
    height: 100%;
}

.body {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.header {
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #fff;
    background-color: deepskyblue;
}

/* 内容区域 */
.main {
    flex: 99;
    overflow-y: scroll;
    background-color: pink;
    
}



#subchange{
    width: 350px;
    height: 50px;
    line-height: 50px;
    border-radius: 25px;
    color: #fff;
    background-color: deepskyblue;

}